// Ceres Solver - A fast non-linear least squares minimizer

// Copyright 2015 Google Inc. All rights reserved.

// http://ceres-solver.org/

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//

// * Redistributions of source code must retain the above copyright notice,

//   this list of conditions and the following disclaimer.

// * Redistributions in binary form must reproduce the above copyright notice,

//   this list of conditions and the following disclaimer in the documentation

//   and/or other materials provided with the distribution.

// * Neither the name of Google Inc. nor the names of its contributors may be

//   used to endorse or promote products derived from this software without

//   specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

//

// Author: keir@google.com (Keir Mierle)

#ifndef CERES_PUBLIC_INTERNAL_PORT_H_

#define CERES_PUBLIC_INTERNAL_PORT_H_

// This file needs to compile as c code.

#ifdef __cplusplus

#include <cstddef>

#include "ceres/internal/config.h"

#if defined(CERES_TR1_MEMORY_HEADER)

#include <tr1/memory>

#else

#include <memory>

#endif

namespace ceres {

#if defined(CERES_TR1_SHARED_PTR)

using std::tr1::shared_ptr;

#else

using std::shared_ptr;

#endif

// We allocate some Eigen objects on the stack and other places they

// might not be aligned to X(=16 [SSE], 32 [AVX] etc)-byte boundaries.  If we

// have C++11, we can specify their alignment (which is desirable, as it means

// we can safely enable vectorisation on matrices).  However, the standard gives

// wide lattitude as to what alignments are legal.  It must be the case that

// alignments up to alignof(std::max_align_t) are valid, but this might be < 16

// on some platforms, in which case even if using C++11, on these platforms

// we should not attempt to align to X-byte boundaries.  If using < C++11,

// we cannot specify the alignment.

#ifdef CERES_USE_CXX11

namespace port_constants {

static constexpr size_t kMaxAlignBytes =

    // Work around a GCC 4.8 bug

    // (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56019) where

    // std::max_align_t is misplaced.

#if defined (__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 8

    alignof(::max_align_t);

#else

    alignof(std::max_align_t);

#endif

}  // namespace port_constants

#endif

}  // namespace ceres

#endif  // __cplusplus

// A macro to signal which functions and classes are exported when

// building a DLL with MSVC.

//

// Note that the ordering here is important, CERES_BUILDING_SHARED_LIBRARY

// is only defined locally when Ceres is compiled, it is never exported to

// users.  However, in order that we do not have to configure config.h

// separately for building vs installing, if we are using MSVC and building

// a shared library, then both CERES_BUILDING_SHARED_LIBRARY and

// CERES_USING_SHARED_LIBRARY will be defined when Ceres is compiled.

// Hence it is important that the check for CERES_BUILDING_SHARED_LIBRARY

// happens first.

#if defined(_MSC_VER) && defined(CERES_BUILDING_SHARED_LIBRARY)

# define CERES_EXPORT __declspec(dllexport)

#elif defined(_MSC_VER) && defined(CERES_USING_SHARED_LIBRARY)

# define CERES_EXPORT __declspec(dllimport)

#else

# define CERES_EXPORT

#endif

#endif  // CERES_PUBLIC_INTERNAL_PORT_H_